1 /*
2 ** Copyright (C) 2008-2017 Erik de Castro Lopo <erikd@mega-nerd.com>
3 **
4 ** This program is free software; you can redistribute it and/or modify
5 ** it under the terms of the GNU Lesser General Public License as published by
6 ** the Free Software Foundation; either version 2.1 of the License, or
7 ** (at your option) any later version.
8 **
9 ** This program is distributed in the hope that it will be useful,
10 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
11 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 ** GNU Lesser General Public License for more details.
13 **
14 ** You should have received a copy of the GNU Lesser General Public License
15 ** along with this program; if not, write to the Free Software
16 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19 #include "sfconfig.h"
20
21 #include <stdio.h>
22 #include <fcntl.h>
23 #include <string.h>
24 #include <ctype.h>
25
26 #include "sndfile.h"
27 #include "sfendian.h"
28 #include "common.h"
29
30 /*
31 ** Info from Olivier Tristan <o.tristan@ultimatesoundbank.com>
32 **
33 ** HEADER
34 ** 2 magic bytes: 1 and 4.
35 ** 17 char for the name of the sample.
36 ** 3 bytes: level, tune and channels (0 for channels is mono while 1 is stereo)
37 ** 4 uint32: sampleStart, loopEnd, sampleFrames and loopLength
38 ** 1 byte: loopMode (0 no loop, 1 forward looping)
39 ** 1 byte: number of beat in loop
40 ** 1 uint16: sampleRate
41 **
42 ** DATA
43 ** Data are always non compressed 16 bits interleaved
44 */
45
46 #define HEADER_LENGTH 42 /* Sum of above data fields. */
47 #define HEADER_NAME_LEN 17 /* Length of name string. */
48
49 /*------------------------------------------------------------------------------
50 ** Private static functions.
51 */
52
53 static int mpc2k_close (SF_PRIVATE *psf) ;
54
55 static int mpc2k_write_header (SF_PRIVATE *psf, int calc_length) ;
56 static int mpc2k_read_header (SF_PRIVATE *psf) ;
57
58 /*------------------------------------------------------------------------------
59 ** Public function.
60 */
61
62 int
mpc2k_open(SF_PRIVATE * psf)63 mpc2k_open (SF_PRIVATE *psf)
64 { int error = 0 ;
65
66 if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0))
67 { if ((error = mpc2k_read_header (psf)))
68 return error ;
69 } ;
70
71 if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_MPC2K)
72 return SFE_BAD_OPEN_FORMAT ;
73
74 if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
75 { if (mpc2k_write_header (psf, SF_FALSE))
76 return psf->error ;
77
78 psf->write_header = mpc2k_write_header ;
79 } ;
80
81 psf->container_close = mpc2k_close ;
82
83 psf->blockwidth = psf->bytewidth * psf->sf.channels ;
84
85 error = pcm_init (psf) ;
86
87 return error ;
88 } /* mpc2k_open */
89
90 /*------------------------------------------------------------------------------
91 */
92
93 static int
mpc2k_close(SF_PRIVATE * psf)94 mpc2k_close (SF_PRIVATE *psf)
95 {
96 if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
97 mpc2k_write_header (psf, SF_TRUE) ;
98
99 return 0 ;
100 } /* mpc2k_close */
101
102 static int
mpc2k_write_header(SF_PRIVATE * psf,int calc_length)103 mpc2k_write_header (SF_PRIVATE *psf, int calc_length)
104 { char sample_name [HEADER_NAME_LEN + 1] ;
105 sf_count_t current ;
106
107 if (psf->pipeoffset > 0)
108 return 0 ;
109
110 current = psf_ftell (psf) ;
111
112 if (calc_length)
113 { psf->filelength = psf_get_filelen (psf) ;
114
115 psf->dataoffset = HEADER_LENGTH ;
116 psf->datalength = psf->filelength - psf->dataoffset ;
117
118 psf->sf.frames = psf->datalength / (psf->bytewidth * psf->sf.channels) ;
119 } ;
120
121 /* Reset the current header length to zero. */
122 psf->header.ptr [0] = 0 ;
123 psf->header.indx = 0 ;
124
125 /*
126 ** Only attempt to seek if we are not writng to a pipe. If we are
127 ** writing to a pipe we shouldn't be here anyway.
128 */
129 if (psf->is_pipe == SF_FALSE)
130 psf_fseek (psf, 0, SEEK_SET) ;
131
132 snprintf (sample_name, sizeof (sample_name), "%-*.*s", HEADER_NAME_LEN, HEADER_NAME_LEN, psf->file.name) ;
133
134 psf_binheader_writef (psf, "e11b", BHW1 (1), BHW1 (4), BHWv (sample_name), BHWz (HEADER_NAME_LEN)) ;
135 psf_binheader_writef (psf, "e111", BHW1 (100), BHW1 (0), BHW1 ((psf->sf.channels - 1) & 1)) ;
136 psf_binheader_writef (psf, "et4888", BHW4 (0), BHW8 (psf->sf.frames), BHW8 (psf->sf.frames), BHW8 (psf->sf.frames)) ;
137 psf_binheader_writef (psf, "e112", BHW1 (0), BHW1 (1), BHW2 ((uint16_t) psf->sf.samplerate)) ;
138
139 /* Always 16 bit little endian data. */
140 psf->bytewidth = 2 ;
141 psf->endian = SF_ENDIAN_LITTLE ;
142
143 psf_fwrite (psf->header.ptr, psf->header.indx, 1, psf) ;
144
145 if (psf->error)
146 return psf->error ;
147
148 psf->dataoffset = psf->header.indx ;
149
150 if (current > 0)
151 psf_fseek (psf, current, SEEK_SET) ;
152
153 return psf->error ;
154 } /* mpc2k_write_header */
155
156 static int
mpc2k_read_header(SF_PRIVATE * psf)157 mpc2k_read_header (SF_PRIVATE *psf)
158 { char sample_name [HEADER_NAME_LEN + 1] ;
159 unsigned char bytes [4] ;
160 uint32_t sample_start, loop_end, sample_frames, loop_length ;
161 uint16_t sample_rate ;
162
163 psf_binheader_readf (psf, "pebb", 0, bytes, 2, sample_name, make_size_t (HEADER_NAME_LEN)) ;
164
165 if (bytes [0] != 1 || bytes [1] != 4)
166 return SFE_MPC_NO_MARKER ;
167
168 sample_name [HEADER_NAME_LEN] = 0 ;
169
170 psf_log_printf (psf, "MPC2000\n Name : %s\n", sample_name) ;
171
172 psf_binheader_readf (psf, "eb4444", bytes, 3, &sample_start, &loop_end, &sample_frames, &loop_length) ;
173
174 psf->sf.channels = bytes [2] ? 2 : 1 ;
175
176 psf_log_printf (psf, " Level : %d\n Tune : %d\n Stereo : %s\n", bytes [0], bytes [1], bytes [2] ? "Yes" : "No") ;
177
178 psf_log_printf (psf, " Sample start : %d\n Loop end : %d\n Frames : %d\n Length : %d\n", sample_start, loop_end, sample_frames, loop_length) ;
179
180 psf_binheader_readf (psf, "eb2", bytes, 2, &sample_rate) ;
181
182 psf_log_printf (psf, " Loop mode : %s\n Beats : %d\n Sample rate : %d\nEnd\n", bytes [0] ? "None" : "Fwd", bytes [1], sample_rate) ;
183
184 psf->sf.samplerate = sample_rate ;
185
186 psf->sf.format = SF_FORMAT_MPC2K | SF_FORMAT_PCM_16 ;
187
188 psf->dataoffset = psf_ftell (psf) ;
189
190 /* Always 16 bit little endian data. */
191 psf->bytewidth = 2 ;
192 psf->endian = SF_ENDIAN_LITTLE ;
193
194 psf->datalength = psf->filelength - psf->dataoffset ;
195 psf->blockwidth = psf->sf.channels * psf->bytewidth ;
196 psf->sf.frames = psf->datalength / psf->blockwidth ;
197
198 psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ;
199
200 return 0 ;
201 } /* mpc2k_read_header */
202
203